<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script src="vue3.js"></script>
    <div id="app">
        <ul>
            <li v-for="book in books" :key="book.id">
                {{book.title}}-{{book.author}}
            </li>
        </ul>
        <p>
            <button @click="addBook">添加书籍</button>
            <button @click="deleteBook">删除书籍</button>
            <button @click="findBook">查找书籍</button>
        </p>
    </div>
    <script>
        constcomApp=Vue.createApp({
            data(){
                return{
                    books:[
                        {id:1,title:"红楼梦",author:"曹雪芹"},
                        {id:2,title:"西游记",author:"吴承恩"},
                        {id:3,title:"三国演义",author:"罗贯中"},
                        {id:4,title:"水浒传",author:"施耐庵"},
                    ]
                }
            },
            methods:{
                addBook(){
                    this.books.push({
                        id:5,
                        title:"史记",
                        author:"司马迁"
                    });
                },
                deleteBook(){
                    if(this.books.length>0){
                        this.books.splice(this.books.length - 1,1);
                    }else{
                        alert("书籍列表为空");
                    }                    
                },
                findBook(){
                    let result=this.books.filter(book=>book.id==1);
                    this.books=result.slice();
                }
            }
        }).mount("#app");
    </script>
</body>
</html>